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1.
Two identical cylinders contain helium at 
and argon at 1 atm respectively. if both the gases are filled in one of the cylinders, the pressure would be:
and argon at 1 atm respectively. if both the gases are filled in one of the cylinders, the pressure would be:
2.
gas are introduced simultaneously from the two ends of a long tube. A white ring of 
appears first
gas are introduced simultaneously from the two ends of a long tube. A white ring of appears first
3.
The molecular weight of 
and 
are 32 and 64 respectively. If one litre of at 
and 759 mm pressure contains 
molecules, the number of molecules in two litre of under the same conditions of temperature and pressure will be:
and are 32 and 64 respectively. If one litre of at and 759 mm pressure contains molecules, the number of molecules in two litre of under the same conditions of temperature and pressure will be:
4.
The pressure of a real gas is less than the pressure of an ideal gas because of
5.
32 g of , 2 g of 
and 28 g of 
at STP occupy separately a volume of
, 2 g of and 28 g of at STP occupy separately a volume of
6.
At what temperature is the rms speed of hydrogen molecules the same as that of oxygen molecules at 
?
?
7.
Mark out the wrong expression
8.
Which is true statement?
9.
If 
is the number of atoms in the unit cell that represents the closest packing sequence..... 
..... , the number of tetrahedral voids in the unit cell is equal to
is the number of atoms in the unit cell that represents the closest packing sequence..... ..... , the number of tetrahedral voids in the unit cell is equal to
10.
A Dewar flask is usually used to: